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/* Copyright (C) 1992, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <sysdeps/unix/sysdep.h>
/* For Linux we can use the system call table in the header file
/usr/include/asm/unistd.h
of the kernel. But these symbols do not follow the SYS_* syntax
so we have to redefine the `SYS_ify' macro here. */
#undef SYS_ify
#ifdef __STDC__
# define SYS_ify(syscall_name) __NR_##syscall_name
#else
# define SYS_ify(syscall_name) __NR_/**/syscall_name
#endif
#ifdef ASSEMBLER
/* This seems to always be the case on PPC. */
#define ALIGNARG(log2) log2
/* For ELF we need the `.type' directive to make shared libs work right. */
#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
#define ASM_SIZE_DIRECTIVE(name) .size name,.-name
/* If compiled for profiling, call `_mcount' at the start of each function. */
#ifdef PROF
/* The mcount code relies on a the return address being on the stack
to locate our caller and so it can restore it; so store one just
for its benefit. */
#ifdef PIC
#define CALL_MCOUNT \
.pushsection; \
.section ".data"; \
.align ALIGNARG(2); \
0:.long 0; \
.previous; \
mflr %r0; \
stw %r0,4(%r1); \
bl _GLOBAL_OFFSET_TABLE_@local-4; \
mflr %r11; \
lwz %r0,0b@got(%r11); \
bl JUMPTARGET(_mcount);
#else /* PIC */
#define CALL_MCOUNT \
.section ".data"; \
.align ALIGNARG(2); \
0:.long 0; \
.previous; \
mflr %r0; \
lis %r11,0b@ha; \
stw %r0,4(%r1); \
addi %r0,%r11,0b@l; \
bl JUMPTARGET(_mcount);
#endif /* PIC */
#else /* PROF */
#define CALL_MCOUNT /* Do nothing. */
#endif /* PROF */
#define ENTRY(name) \
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \
ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \
.align ALIGNARG(2); \
C_LABEL(name) \
CALL_MCOUNT
#define EALIGN_W_0 /* No words to insert. */
#define EALIGN_W_1 nop
#define EALIGN_W_2 nop;nop
#define EALIGN_W_3 nop;nop;nop
#define EALIGN_W_4 EALIGN_W_3;nop
#define EALIGN_W_5 EALIGN_W_4;nop
#define EALIGN_W_6 EALIGN_W_5;nop
#define EALIGN_W_7 EALIGN_W_6;nop
/* EALIGN is like ENTRY, but does alignment to 'words'*4 bytes
past a 2^align boundary. */
#ifdef PROF
#define EALIGN(name, alignt, words) \
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \
ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \
.align ALIGNARG(2); \
C_LABEL(name) \
CALL_MCOUNT \
b 0f; \
.align ALIGNARG(alignt); \
EALIGN_W_##words; \
0:
#else /* PROF */
#define EALIGN(name, alignt, words) \
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \
ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \
.align ALIGNARG(alignt); \
EALIGN_W_##words; \
C_LABEL(name)
#endif
#undef END
#define END(name) \
ASM_SIZE_DIRECTIVE(name)
#define DO_CALL(syscall) \
li 0,syscall; \
sc
#ifdef PIC
#define JUMPTARGET(name) name##@plt
#else
#define JUMPTARGET(name) name
#endif
#define PSEUDO(name, syscall_name, args) \
.section ".text"; \
ENTRY (name) \
DO_CALL (SYS_ify (syscall_name));
#define PSEUDO_RET \
bnslr; \
b JUMPTARGET(__syscall_error)
#define ret PSEUDO_RET
#undef PSEUDO_END
#define PSEUDO_END(name) \
END (name)
/* Local labels stripped out by the linker. */
#define L(x) .L##x
#endif /* ASSEMBLER */
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